Axial expansion compensator for pipe conduits



Aug. 1e:9 1949o A. DRI-:YER 2,479,104

AXIAL EXPANSION COMPENS'ATOR FOR PIPE CONDUITS Filed Aug. 13, 1945 g rings 44 or 42.

borders 23 packing rings 38 are also provided so that in bolting together the flanges 26 and 21 on one hand and the flanges 28 and 29 on the other hand by tap bolts 4| a tight seal is obtained.

The fastening ring 39 is threadedly connected with a ring 42 which is welded together with the tube 34 which is displaceable in the manner of a slide at a point 43. In the same way the fastening ring 40 is threadedly connected with a ring 44 which is connected to the second tube 35 which is displaceable in the manner of a slide at a point 45 by welding. By welding together the ends ,of the tubes 34 and 35 with the rings 42 and 44 respectively said tube ends are I strengthened.

After the three resilient corrugated tube ele- VThereupon either of the intermediate fastening rings 39 or 40 are screwed to the associated rings 42 or 44 and then the resilient corrugated tube element 2| is slid in position and the other fastenf ingl rings 40 or 39 are screwed to the respective Afterwards the resilient corrugated tube elements 2|) and 22 are pushed in position and the fastening rings 3| and 32 respectively are screwed home. Finally, the flanges 26, 21 and 28, 29 respectively are tightly screwed home by means of the bolts 4 I.

Disassembling of the compensator can be carried out in reversed sequence at any time;

As will be readily seen the instant compensay tor is provided with three collateral chambers each'of which is closed towards outside by the respective resilient corrugated tube element 20,

2| or 22 the central chamber of which has a greater outer diameter than the two other chambers. The chamber walls formed by the respective flanges 25, 26, 21, 28, 29 .or 30 andthe rings 3|, 32, 39, 40, 42 or 44 are relatively displaceable l in the manner of slides by virtue of being connected to the tubes 34 and 35 so that in pushing the `end walls of the outer chambers towards each other the latter are accordingly decreased in length while the central chamber is increased Walls of the outer chambers these are increased in length, and vice versa, in pulling apart the 4 ,in length, whereas the central chamber is accordingly contracted.

I claim:

In an axial expansion compensator for longitudinally variable pressure fluid conduits, in combination, three axially aligning walled chambers, two terminal annular fluid passage flanges respectively adjoining the outer ends of the end chambers substantially coaxially therewith, a bellows-like tube element forming an enclosure surrounding each said chambers, the central said chamber having a larger outer diameter than said end chambers, and the walls of said chambers being arranged for relative axial displacement for compensating any length variations of said conduit, means for detachably connecting the end bellows-like elements to the respective terminal anges, said anges and connecting means being formed with tongue and groove joints which the ends of the respective bellowslike elements are seated, screw means located exteriorly of the said joints for drawing said flanges and connecting means together to grip the ends of the bellows-like elements in said joints, fastening rings mounted on the walls forming said chambers at the inner ends of the outer of said chambers, pairs of connectingA rings l .on opposite sides of the respective fastening rings,

` spective ends of theY bellows-like elements into the latter said tongue and groove joints.

ALBERT DREYER.

REFERENCES CITED The following references are of ,record in the file of this patent:

UNITED STATES PATENTS Number j Name Date 1,666,637 Aldrich et al Apr. 17, 1928 2,014,355 Hussman;V Sept. 10, 1935 A FOREIGN PATENTS Number Y f f Country Date 215,472 Switzerland June 30, 1941 

